---
title: Testing
---

## Overview

All examples in this guide will be written using [Pest](https://pestphp.com). However, you can easily adapt this to PHPUnit.

Since the Form Builder works on Livewire components, you can use the [Livewire testing helpers](https://livewire.laravel.com/docs/testing). However, we have custom testing helpers that you can use with forms:

## Filling a form

To fill a form with data, pass the data to `fillform()`:

```php
use function Pest\Livewire\livewire;

livewire(CreatePost::class)
    ->fillForm([
        'title' => fake()->sentence(),
        // ...
    ]);
```

> If you have multiple forms on a Livewire component, you can specify which form you want to fill using `fillForm([...], 'createPostForm')`.

To check that a form has data, use `assertFormSet()`:

```php
use Illuminate\Support\Str;
use function Pest\Livewire\livewire;

it('can automatically generate a slug from the title', function () {
    $title = fake()->sentence();

    livewire(CreatePost::class)
        ->fillForm([
            'title' => $title,
        ])
        ->assertFormSet([
            'slug' => Str::slug($title),
        ]);
});
```

> If you have multiple forms on a Livewire component, you can specify which form you want to check using `assertFormSet([...], 'createPostForm')`.

## Validation

Use `assertHasFormErrors()` to ensure that data is properly validated in a form:

```php
use function Pest\Livewire\livewire;

it('can validate input', function () {
    livewire(CreatePost::class)
        ->fillForm([
            'title' => null,
        ])
        ->assertHasFormErrors(['title' => 'required']);
});
```

And `assertHasNoFormErrors()` to ensure there are no validation errors:

```php
use function Pest\Livewire\livewire;

livewire(CreatePost::class)
    ->fillForm([
        'title' => fake()->sentence(),
        // ...
    ])
    ->call('save')
    ->assertHasNoFormErrors();
```

> If you have multiple forms on a Livewire component, you can pass the name of a specific form as the second parameter like `assertHasFormErrors(['title' => 'required'], 'createPostForm')` or `assertHasNoFormErrors([], 'createPostForm')`.

## Form existence

To check that a Livewire component has a form, use `assertFormExists()`:

```php
use function Pest\Livewire\livewire;

it('has a form', function () {
    livewire(CreatePost::class)
        ->assertFormExists();
});
```

> If you have multiple forms on a Livewire component, you can pass the name of a specific form like `assertFormExists('createPostForm')`.

## Fields

To ensure that a form has a given field, pass the field name to `assertFormFieldExists()`:

```php
use function Pest\Livewire\livewire;

it('has a title field', function () {
    livewire(CreatePost::class)
        ->assertFormFieldExists('title');
});
```

You may pass a function as an additional argument in order to assert that a field passes a given "truth test". This is useful for asserting that a field has a specific configuration:

```php
use function Pest\Livewire\livewire;

it('has a title field', function () {
    livewire(CreatePost::class)
        ->assertFormFieldExists('title', function (TextInput $field): bool {
            return $field->isDisabled();
        });
});
```

> If you have multiple forms on a Livewire component, you can specify which form you want to check for the existence of the field like `assertFormFieldExists('title', 'createPostForm')`.

### Hidden fields

To ensure that a field is visible, pass the name to `assertFormFieldIsVisible()`:

```php
use function Pest\Livewire\livewire;

test('title is visible', function () {
    livewire(CreatePost::class)
        ->assertFormFieldIsVisible('title');
});
```

Or to ensure that a field is hidden you can pass the name to `assertFormFieldIsHidden()`:

```php
use function Pest\Livewire\livewire;

test('title is hidden', function () {
    livewire(CreatePost::class)
        ->assertFormFieldIsHidden('title');
});
```

> For both `assertFormFieldIsHidden()` and `assertFormFieldIsVisible()` you can pass the name of a specific form the field belongs to as the second argument like `assertFormFieldIsHidden('title', 'createPostForm')`.

### Disabled fields

To ensure that a field is enabled, pass the name to `assertFormFieldIsEnabled()`:

```php
use function Pest\Livewire\livewire;

test('title is enabled', function () {
    livewire(CreatePost::class)
        ->assertFormFieldIsEnabled('title');
});
```

Or to ensure that a field is disabled you can pass the name to `assertFormFieldIsDisabled()`:

```php
use function Pest\Livewire\livewire;

test('title is disabled', function () {
    livewire(CreatePost::class)
        ->assertFormFieldIsDisabled('title');
});
```

> For both `assertFormFieldIsEnabled()` and `assertFormFieldIsDisabled()` you can pass the name of a specific form the field belongs to as the second argument like `assertFormFieldIsEnabled('title', 'createPostForm')`.
